/*
 * LCD Image Converter. Converts images and fonts for embedded applications.
 * Copyright (C) 2012 riuson
 * mailto: riuson@gmail.com
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/
 */

#ifndef HISTORYKEEPER_H
#define HISTORYKEEPER_H
//-----------------------------------------------------------------------------
#include <QObject>
#include <QString>
#include <QImage>
#include <QVariant>
#include <QList>
#include <QMap>

//-----------------------------------------------------------------------------
class HistoryRecord;
//-----------------------------------------------------------------------------
class HistoryKeeper : public QObject
{
    Q_OBJECT
public:
    explicit HistoryKeeper(QObject *parent = 0);
    ~HistoryKeeper();

    void init(
            const QMap<QString, QImage *> *images,
            const QMap<QString, QVariant> *info);
    void store(
            const QMap<QString, QImage *> *images,
            const QMap<QString, QVariant> *info);
    void restorePrevious(
            QMap<QString, QImage *> *images,
            QMap<QString, QVariant> *info);
    void restoreNext(
            QMap<QString, QImage *> *images,
            QMap<QString, QVariant> *info);

    bool initialized() const;
    bool canRestorePrevious() const;
    bool canRestoreNext() const;

private:
    QList<HistoryRecord *> *mHistory;
    int mCurrentIndex;

    void removeAfter(int index);
    void restoreAt(
            int index,
            QMap<QString, QImage *> *images,
            QMap<QString, QVariant> *info);
};
//-----------------------------------------------------------------------------
#endif // HISTORYKEEPER_H
